400m U23 Women ; Official result since 12:05
| Rank | Lane | ID | Name | PB | Team | Cat | Result | Info | Video |
| 1 | 1 | 204 | BROMELL Jenna | Emerald A.C. | 55.42 | ||||
| 2 | 1 | 60 | RYAN Holly | Raheny Shamrock A.C. | 1:00.94 | ||||
| 3 | 1 | 318 | CONROY Aoife | Sli Cualann A.C. | 1:01.27 | ||||
| 4 | 1 | 353 | CAMPION Aoife | St. Abbans A.C. | 1:03.15 |